1 /* 2 * Copyright (C) 2008, 2009 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "bindings/v8/V8NodeFilterCondition.h" 33 34 #include "V8Node.h" 35 #include "bindings/v8/ScriptController.h" 36 #include "bindings/v8/ScriptState.h" 37 #include "bindings/v8/V8HiddenPropertyName.h" 38 #include "core/dom/Node.h" 39 #include "core/dom/NodeFilter.h" 40 #include "wtf/OwnArrayPtr.h" 41 42 namespace WebCore { 43 44 V8NodeFilterCondition::V8NodeFilterCondition(v8::Handle<v8::Value> filter, v8::Handle<v8::Object> owner) 45 : m_filter(filter) 46 { 47 owner->SetHiddenValue(V8HiddenPropertyName::condition(), filter); 48 m_filter.makeWeak(this, &makeWeakCallback); 49 } 50 51 V8NodeFilterCondition::~V8NodeFilterCondition() 52 { 53 } 54 55 short V8NodeFilterCondition::acceptNode(ScriptState* state, Node* node) const 56 { 57 ASSERT(v8::Context::InContext()); 58 59 v8::Isolate* isolate = state->isolate(); 60 v8::HandleScope handleScope(isolate); 61 v8::Handle<v8::Value> filter = m_filter.newLocal(isolate); 62 ASSERT(!filter.IsEmpty()); 63 if (!filter->IsObject()) 64 return NodeFilter::FILTER_ACCEPT; 65 66 v8::TryCatch exceptionCatcher; 67 68 v8::Handle<v8::Function> callback; 69 if (filter->IsFunction()) 70 callback = v8::Handle<v8::Function>::Cast(filter); 71 else { 72 v8::Local<v8::Value> value = filter->ToObject()->Get(v8::String::NewSymbol("acceptNode")); 73 if (!value->IsFunction()) { 74 throwTypeError("NodeFilter object does not have an acceptNode function", state->isolate()); 75 return NodeFilter::FILTER_REJECT; 76 } 77 callback = v8::Handle<v8::Function>::Cast(value); 78 } 79 80 OwnArrayPtr<v8::Handle<v8::Value> > args = adoptArrayPtr(new v8::Handle<v8::Value>[1]); 81 args[0] = toV8(node, v8::Handle<v8::Object>(), state->isolate()); 82 83 v8::Handle<v8::Object> object = v8::Context::GetCurrent()->Global(); 84 v8::Handle<v8::Value> result = ScriptController::callFunctionWithInstrumentation(0, callback, object, 1, args.get()); 85 86 if (exceptionCatcher.HasCaught()) { 87 state->setException(exceptionCatcher.Exception()); 88 return NodeFilter::FILTER_REJECT; 89 } 90 91 ASSERT(!result.IsEmpty()); 92 93 return result->Int32Value(); 94 } 95 96 void V8NodeFilterCondition::makeWeakCallback(v8::Isolate*, v8::Persistent<v8::Value>*, V8NodeFilterCondition* condition) 97 { 98 condition->m_filter.clear(); 99 } 100 101 } // namespace WebCore 102
